Stalemate: a game ends in stalemate
if it is your turn to move, but there is no move you can legally make - you cannot move your king without placing it in check.Example

Perpetual check: a game ends when one player continually puts the other in check. It is often used to escape a likely
defeat & force a draw.ExampleRepetition of moves:
if the same position occurs three times in one game, a player can claim a draw. This can only be claimed if moves are recorded.

Draw by agreement:
if both players agree that they are equally matched in position & material, and not likely to reach checkmate, they can agree to a draw.

Nothing happening:
when both players have made 50 moves without making a capture or moving a pawn, they can claim a draw.

Not enough firepower: the following piece combinations are not enough to give checkmate -king & bishop v king; king & knight
v king; king & 2 knights v king; king v king